nginx proxy_pass ssl handshake error

Nobody has claimed this yet.

OpenResty version is
nginx version: openresty/1.15.8.2
Hi, I am new to nginx lua scripting and I am trying to write a small script based on the user request, the script queries the redis server and fetches the key based on the uri
This nginx server is running behind a envoyproxy
For example: If user requests for https://test.example.com/345678
lua script queries redis for key 345678 and fetches the file path which is /root/test/test.mpd
this files should be then served by nginx to the user

This is my lua script

server {
        root /root/test;
        index index.html;
        server_name test.example.com;
	absolute_redirect off;
        location ~ ^/(.*?)/?$ {
	resolver 8.8.4.4;
	server_tokens off;
        default_type 'text/plain';
	set $target "";
        access_by_lua '
                    local redis = require "resty.redis"
		    local key1 = ngx.var.request_uri
		    local key2 = ngx.var.host..key1
                    local red = redis:new()
                    red:set_timeout(1000)
                    local ok, err = red:connect("10.0.0.1", 6379)
                    if not ok then
                        ngx.say("failed to connect: ", err)
                        return
                    end
		    local res, err = red:auth("testauth")
    		    if not res then
                      ngx.say("failed to authenticate: ", err)
                      return
                    end
	            local host, err = red:get(key2)
	            if not host then
                    	ngx.say("failed to get redis key: ", err)
		        return ngx.exit(500)
                    end
		    if host == ngx.null then
		        ngx.say("no value found for key ", key2)
                        return ngx.exit(400)
                    end
	        ngx.var.target = host
         ';
	proxy_pass https://test.example.com$target;
        }
}

this is my nginx error log
2020/05/06 12:30:20 [error] 938#938: *249 peer closed connection in SSL handshake (104: Connection reset by peer) while SSL handshaking to upstream, client: 10.0.0.0, server: test.example.com, request: "GET /345678 HTTP/1.1", upstream: "https://8.9.9.9:443/test/test.mpd/, host: "test.example.com"
expected behaviour was getting the response 200 and serving the actual file path to the request
output curl -s https://test.example.com/345678
I got 502 bad gateway error

<head><title>502 Bad Gateway</title></head>
<body>
<center><h1>502 Bad Gateway</h1></center>
<hr><center>openresty</center>
</body>
</html>

Start with the inline nginx server configuration, especially the access_by_lua block and proxy_pass directive, then review the reported upstream SSL handshake error. Reproduce the request with curl and compare the upstream log details; done means the mapped request returns HTTP 200 and serves the expected file instead of a 502.

Written by the indexing model from the issue text.

Description

Contributor guide

First steps

Research direction

Assessment